Horticulture grow lights

Abstract

A grow light includes a plurality of cool white LEDs, a plurality of warm white LEDs, and a driver electrically coupled to the cool white LEDs and the warm white LEDs. An intensity level and spectral composition of the radiant energy emitted by the grow light may be tuned or configured by varying a ratio of the quantity of cool white LEDs to the quantity of warm white LEDs, by varying a spatial arrangement among the cool white LEDs and the warm white LEDs, or by varying a level of current provided to some or all of the cool white LEDs and the warm white LEDs.

What is claimed is: 
     
       1. A horticulture grow light, comprising:
 a plurality of cool white LEDs; 
 a plurality of warm white LEDs; 
 one or more first DC power circuits electrically coupled to the cool white LEDs and the warm white LEDs, wherein the horticulture grow light is configured to emit a radiant energy having a spectral composition having a first-highest peak wavelength of from 400 nm to 510 nm or from 560 nm to 780 nm and, with respect to the first-highest peak wavelength, a second-highest peak wavelength of from 400 nm to 510 nm or from 560 nm to 780 nm; and 
 a plurality of supplemental radiation emitters and a second DC power circuit electrically coupled to the plurality of supplemental radiation emitters, wherein the one or more first DC power circuits is configured to drive the plurality of cool and warm white LEDs and not the plurality of supplemental radiation emitters, and the second DC power circuit is configured to drive the supplemental radiation emitters and not the plurality of cool and warm white LEDs. 
 
     
     
       2. The horticulture grow light of  claim 1 , wherein the spectral composition of the radiant energy emitted by the horticulture grow light is reconfigurable. 
     
     
       3. The horticulture grow light of  claim 1 , wherein a quantity of the cool white LEDs is greater than a quantity of the warm white LEDs. 
     
     
       4. The horticulture grow light of  claim 1 , wherein a ratio of a quantity of the cool white LEDs to a quantity of the warm white LEDs is from 1:1 to 5:1. 
     
     
       5. The horticulture grow light of  claim 1 , wherein the cool white LEDs and the warm white LEDs are configured in a plurality of alternating strips. 
     
     
       6. The horticulture grow light of  claim 5 , wherein a spacing among the plurality of alternating strips of cool white LEDs and warm white LEDs is uniform. 
     
     
       7. The horticulture grow light of  claim 1 , wherein at least a portion of the cool white LEDs and at least a portion of the warm white LEDs are configured such that each of the cool white LEDs is adjacent to at least two of the warm white LEDs. 
     
     
       8. The horticulture grow light of  claim 7 , wherein a spacing between each of the cool white LEDs and each of the adjacent warm white LEDs is uniform. 
     
     
       9. The horticulture grow light of  claim 1 , wherein the one or more first DC power circuits is configured to provide to each of the cool white LEDs and each of the warm white LEDs a current level of from 70 mA to 90 mA. 
     
     
       10. The horticulture grow light of  claim 1 , wherein the first-highest peak wavelength is from 430 nm to 470 nm. 
     
     
       11. The horticulture grow light of  claim 10 , wherein the second-highest peak wavelength is from 560 nm to 640 nm. 
     
     
       12. The horticulture grow light of  claim 1 , wherein the spectral composition of the radiant energy collectively emitted by the cool white LEDs and the warm white LEDs comprises wavelengths ranging from 400 nm to 800 nm. 
     
     
       13. The horticulture grow light of  claim 1 , wherein the spectral composition of the radiant energy collectively emitted by the cool white LEDs has, with respect to the first-highest peak wavelength and the second-highest peak wavelength, a third-highest peak wavelength of from 300 nm to 400 nm. 
     
     
       14. The horticulture grow light of  claim 1 , further comprising a control module configured to automatically reconfigure the spectral composition of the radiant energy collectively emitted by the cool white LEDs and the warm white LEDs based on a photoautotroph growth cycle. 
     
     
       15. The horticulture grow light of  claim 1 , wherein the plurality of supplemental radiation emitters are configured to emit visible light. 
     
     
       16. The horticulture grow light of  claim 1 , wherein the plurality of supplemental radiation emitters are configured to emit ultraviolet radiation having wavelengths ranging from 300 nm to 400 nm. 
     
     
       17. The horticulture grow light of  claim 1 , wherein the plurality of supplemental radiation emitters are configured to emit infrared radiation having wavelengths from 700 nm to 1 mm. 
     
     
       18. A horticulture grow light, comprising:
 a plurality of cool white LEDs; 
 a plurality of warm white LEDs; 
 a first LED DC power circuit electrically coupled to the cool white LEDs; 
 a second LED DC power circuit electrically coupled to the warm white LEDs, wherein the horticulture grow light is configured to emit a radiant energy having a spectral composition having a first-highest peak wavelength of from 400 nm to 510 nm or from 560 nm to 780 nm and, with respect to the first-highest peak wavelength, a second-highest peak wavelength of from 400 nm to 510 nm or from 560 nm to 780nm; and 
 a plurality of supplemental radiation emitters and a third DC power circuit electrically coupled to the plurality of supplemental radiation emitters, wherein the first and second LED DC power circuits are configured to drive the plurality of cool and warm white LEDs, respectively, and not the plurality of supplemental radiation emitters, and the third DC power circuit is configured to drive the supplemental radiation emitters and not the plurality of cool and warm white LEDs. 
 
     
     
       19. A horticulture grow light, comprising:
 a plurality of light engines, each light engine comprising a plurality of cool white LEDs and a plurality of warm white LEDs electrically coupled to one or more circuit boards and 
 one or more first DC power circuits electrically coupled to at least one of the light engines, wherein the horticulture grow light is configured to emit a radiant energy having a spectral composition having a first-highest peak wavelength of from 400 nm to 510 nm or from 560 nm to 780 nm and, with respect to the first-highest peak wavelength, a second-highest peak wavelength of from 400 nm to 510 nm or from 560 nm to 780 nm; and 
 a plurality of supplemental radiation emitters and a second DC power circuit electrically coupled to the plurality of supplemental radiation emitters, wherein the one or more first DC power circuits is configured to drive the plurality of cool and warm white LEDs and not the plurality of supplemental radiation emitters, and the second DC power circuit is configured to drive the supplemental radiation emitters and not the plurality of cool and warm white LEDs.